Transformer bushing and terminal board.



I S. E. JOHANNESEN. TRANSFORMER BUSHING AND TERMINAL BOARD.

AIPPLIOATION FILED FEB. 6, 1912.

1,075,573. Patented 0@t.14,1913.

VV/tnesses: Inventor:

77 Svend EJohann esen,

- I I v I, I I I His aqi ztor-ne y.

. sax, a citizen of the United States,

at Pittsfield, county at Berkshire, -Massachusetts,- have invented o'er-tam new sraras TENT OFFICE "avmr. irons-swan, or rrrrsrm'nn, mssacnusnrrs', AssIcNon 'ro- GENERAL morale comm,- a cdaroaarxon or NEW YORK.

" raansronuan avsmne ant rsnmmat' roam).

Ta cllwkomitmay concern.

B' it known that I, SvnNn E. Jommiresiding State of and useful Improvements in Transformer Bushings and Terminal Boards, of which;

the following is as ification.

.My invention-re a'te's toeambined bush ings and terminal boards for electrical transformers.

Oneof its objects is, the. cheapening of the cost of production of transformers by cheapening the cost of production of the terminal board and bush' and by -reducin the labor required for t eir assembly in the transformer.

. Another object is the provision of suitabl means for holding the terminal board in lace. p Herctofore in transformers the terminal boards to which the ends of the windings and the leading-in wires are brought and at which the interconnections are made, and the bushings for the leading-in wires have been constructed in separate pieces. The bushin have been supported by the casing throng which the leading-in wires pass.

The terminal boards have been separately placed and have beensupported in various positions, often on the core. I propose to construct the terminal board and one or more bushin s in one piece; the cost of roduction of t e combined piece is less t an the sumof the costs as separate pieces. The whole may be placed in position at a cost in labor hardly exceedin the cost for locating a bushing alone, an it is unne'c-r essary to further terminal board. f

. In the drawings, which form a part of this specification, are illustrated two construcprovide for attaching the trons embodying-my. invention.

I board and :bus

Figure 1 is an elevation of a transformer casing broken awa to show a combined terminal board and ushing, the latter being artly in section on the lines A, A of Fig. 2.

ig. 2'is a plan view'of alcombined termlnal with two leading-in wires, all located in a. transforms casing wall. Fig. 3 is. a plan viewof anot er combined terminal board'zcnd bushingswith one leading-in wire, the whole located fin the corner of a transformer casing. 6

Fig. 2 my invention embodied a from that I Specification oi tet te'r's Patent. P t t d'o t, 14, 1913, a plication flledl'ebruary e, 1912.- Serial in.

construction wherein the bushing accommodates two leading-in wires. The bushing part, 1, has the general rectangular shape of the bushings now in common use, and is provided with a collar, 2, to hold the same in position.- The bushing portion is adapted to reach through and beyond the casing well.- For the terminal board portion I ontend the top of the bushing in such a direction that when the bushing is in position, the extension is toward the center of the. casing as shown in' the figures, particularly Fig. 1. This extension, 3, will in each case be of a design suitable for the particular use to which it will be put as a terminal board.

board designs. The terminals 4 to which are attached the leads 7 and the leading-in wires 8, are separated from each other by barrie'rs 6. Connecting links 5 makethe necessary connections between the various leads and leading-in wires. The combined board and bushing is made of any suitable material and is formed in any desirable way. Porcelain and other compositions are now employed for similar articles and are pressed to form; these materials and this method of construction are quite suitable for the constructions I have here illustrated: My invention, however, I do not regard as limited to a construction made from one piece, of material or a construction made by asingle operation. y

The construction shown in Fig. 3- differs shown in Fig. 2 merely in design. This construction is in general triangular in shape 'to adapt it for use in the corner of a casing or tank. But one leading-in wire comes through this bushing, which, in'this case,is circular.

It will be apparentthat the advanta es of cheapness of production and'of suita 1e location of the terminal board are obtained in the construct-ions described above and may beobtained in other constructions involvmg my invention.

What I claim as new and desire to secure by Letters Patent of the United States, is:

1. A combined terminal board and bushing for electrical transformers com rising a projecting bushing portion adapte to; proect through the wall of the transformer casing and an extension therefrom provided with terminals for connection to the transformer windings and the external lead or leads and with means for interconnecting the windings and the lead or leads as required.

lead or leads, and means for interconnecting the same, mounted on said extension.

3. The combination with a transformer casing provided Witfaan opening in the wall thereof, of a combined terminal board and emme bushing comprising a bushing portion projecting outward through the opening in the casing Wail, an extension therefrom extendingtoward the center of the casing and having a shoulder, substantially surround ing the bushing portion and engaging the Wall of the casing in proximity to the-opening therethrough, and terminals for connection to the transformer windings and the external lead or leads and means for interoonnecting the same, mounted on said extension.

In witness whereof, l have hereunto .set my hand this 1st. day of Feb, 1912.

SVEND JOHANNESEN.

1 Witnesses:

' Comes-E. Lnn, "ROBERT'J. CONNOR."

copies of this oaizentj'maiy 'he obtainedtor five ee nts eaeh, by addressing the Commissionerof Patents.

Washington, 2?, 

